Title:
METHOD FOR MANUFACTURING MOLDED ARTICLE, AND DEVICE FOR MANUFACTURING MOLDED ARTICLE
Document Type and Number:
WIPO Patent Application WO/2015/174255
Kind Code:
A1
Abstract:
[Problem] The present invention relates to a manufacturing method for obtaining a molded article having an expanded layer in the molded article, wherein an expanding agent and device used to manufacture a resin having expansion properties, and a means for increasing expansion ratio are provided. [Solution] In the present invention, an expanding agent placed in a heating cylinder of a molding machine is configured as a liquid, the volume of the expanding agent is controlled, and the expanding agent is injected into a molten resin in the heating cylinder of the molding machine. The volume of the injected expanding agent can thereby be accurately measured each time. When a low-boiling liquid such as water, an alcohol, or an ether is used as the injected expanding agent, all of the liquid is vaporized by the temperature of the heating cylinder of the molding machine, and no residue thereof is therefore left in the molded article. When sodium bicarbonate water is used as the injected expanding agent, solvent water vaporizes and water vapor also becomes expandable gas, which is less expensive than using sodium bicarbonate as the expanding agent for a master batch using the resin that is to be molded.
Inventors:
SUZUKI YASUHIRO (JP)
Application Number:
PCT/JP2015/062611
Publication Date:
November 19, 2015
Filing Date:
April 24, 2015
Export Citation:
Assignee:
SUZUKI YASUHIRO (JP)
International Classes:
B29C45/18; B29C39/24; B29C48/29
Foreign References:
| JP2005125767A | 2005-05-19 | |||
| JP2004050566A | 2004-02-19 | |||
| JP2005532939A | 2005-11-04 | |||
| JP2002337186A | 2002-11-27 | |||
| JP2001216029A | 2001-08-10 | |||
| JP2004044650A | 2004-02-12 | |||
| JP2005029749A | 2005-02-03 |
Other References:
See also references of EP 3144119A4
Download PDF: